Effects of Notch Radius and Thickness on the Tensile Strength and Fracture Mechanisms of Al6061-T6 Plate Specimens
- Authors
- Wang, Liang; Du, Xiao; Choi, Nak-Sam
- Issue Date
- Feb-2022
- Publisher
- 한국정밀공학회
- Keywords
- Notch strengthening; Ductile fracture; Thickness effect; Maximum stress triaxiality
- Citation
- International Journal of Precision Engineering and Manufacturing, v.23, no.2, pp 177 - 194
- Pages
- 18
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- International Journal of Precision Engineering and Manufacturing
- Volume
- 23
- Number
- 2
- Start Page
- 177
- End Page
- 194
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/108000
- DOI
- 10.1007/s12541-021-00613-y
- ISSN
- 2234-7593
2005-4602
- Abstract
- In this study, the tensile strength and fracture mechanisms of Al6061-T6 plate specimens were evaluated based on von Mises stress and triaxial tensile stress according to the specimen geometry. Stress states at four representative sites (center, position of the maximum stress triaxiality, skin, and notch tip) on the cross-section of the gauge portion were analyzed under tensile testing. The notch strength ratios of specimens with a small notch radius significantly increase with an increase in thickness, whereas those of specimens with a large notch radius change very little. The intensity and position of the maximum stress triaxiality change significantly with varying notch radii and thicknesses. Consequently, with an increase in the thickness and decrease in the notch radius, the shear fracture mode transforms into a tensile-shear mixed fracture mode through the evolution of the stress state and plastic deformation.
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